lkml.org 
[lkml]   [2006]   [May]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[PATCH/RFC 2.6.16.5 1/1] usb/media/quickcam_messenger driver v2
Hi Greg KH, USB folk, kernel folk,

Appended is v2 of my patch adding a usbvideo driver for the Logitech
Quickcam Messenger USB webcam. This patch is against 2.6.16.5. The
corrections are as follows:
(Thanks to Oliver Neukum for the review and suggestions)
- removing structs built on the stack instead of statically
- checking for IO errors throughout the interface functions
- race condition for urb submission
- unneccesary conditional on kfree

Please let me know if it looks okay and if you have any feedback
or suggestions.

Thanks,
Jaya Kumar


Signed-off-by: Jaya Kumar <jayakumar.video@gmail.com>

---

Kconfig | 18
Makefile | 1
quickcam_messenger.c | 1121 +++++++++++++++++++++++++++++++++++++++++++++++++++
quickcam_messenger.h | 126 +++++
4 files changed, 1266 insertions(+)

---

diff -X linux-2.6.16.5/Documentation/dontdiff -uprN linux-2.6.16.5-vanilla/drivers/usb/media/Kconfig linux-2.6.16.5/drivers/usb/media/Kconfig
--- linux-2.6.16.5-vanilla/drivers/usb/media/Kconfig 2006-04-15 11:02:25.000000000 +0800
+++ linux-2.6.16.5/drivers/usb/media/Kconfig 2006-04-15 11:27:25.000000000 +0800
@@ -224,3 +224,21 @@ config USB_PWC

To compile this driver as a module, choose M here: the
module will be called pwc.
+
+config USB_QUICKCAM_MESSENGER
+ tristate "USB Logitech Quickcam Messenger"
+ depends on USB && VIDEO_DEV
+ ---help---
+ Say Y or M here to enable support for the USB Logitech Quickcam
+ Messenger webcam.
+
+ The built-in microphone is enabled by selecting USB Audio support.
+
+ This driver uses the Video For Linux API. You must say Y or M to
+ "Video For Linux" (under Character Devices) to use this driver.
+ Information on this API and pointers to "v4l" programs may be found
+ at <file:Documentation/video4linux/API.html>.
+
+ To compile this driver as a module, choose M here: the
+ module will be called quickcam_messenger.
+
diff -X linux-2.6.16.5/Documentation/dontdiff -uprN linux-2.6.16.5-vanilla/drivers/usb/media/Makefile linux-2.6.16.5/drivers/usb/media/Makefile
--- linux-2.6.16.5-vanilla/drivers/usb/media/Makefile 2006-04-15 11:02:25.000000000 +0800
+++ linux-2.6.16.5/drivers/usb/media/Makefile 2006-04-15 11:28:01.000000000 +0800
@@ -17,3 +17,4 @@ obj-$(CONFIG_USB_STV680) += stv680.o
obj-$(CONFIG_USB_VICAM) += vicam.o usbvideo.o
obj-$(CONFIG_USB_W9968CF) += w9968cf.o
obj-$(CONFIG_USB_PWC) += pwc/
+obj-$(CONFIG_USB_QUICKCAM_MESSENGER) += quickcam_messenger.o usbvideo.o
diff -X linux-2.6.16.5/Documentation/dontdiff -uprN linux-2.6.16.5-vanilla/drivers/usb/media/quickcam_messenger.c linux-2.6.16.5/drivers/usb/media/quickcam_messenger.c
--- linux-2.6.16.5-vanilla/drivers/usb/media/quickcam_messenger.c 1970-01-01 07:30:00.000000000 +0730
+++ linux-2.6.16.5/drivers/usb/media/quickcam_messenger.c 2006-05-15 15:59:15.000000000 +0800
@@ -0,0 +1,1121 @@
+/*
+ * Driver for Logitech Quickcam Messenger usb video camera
+ * Copyright (C) Jaya Kumar
+ *
+ * This work was sponsored by CIS(M) Sdn Bhd.
+ * History:
+ * 05/08/2006 - Jaya Kumar
+ * I wrote this based on the konicawc by Simon Evans.
+ * -
+ * Full credit for reverse engineering and creating an initial
+ * working linux driver for the VV6422 goes to the qce-ga project by
+ * Tuukka Toivonen, Jochen Hoenicke, Peter McConnell,
+ * Cristiano De Michele, Georg Acher, Jean-Frederic Clere as well as
+ * others.
+ * ---
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/input.h>
+#include <linux/usb_input.h>
+
+#include "usbvideo.h"
+#include "quickcam_messenger.h"
+
+/*
+ * Version Information
+ */
+
+#ifdef CONFIG_USB_DEBUG
+static int debug;
+#define DEBUG(n, format, arg...) \
+ if (n <= debug) { \
+ printk(KERN_DEBUG __FILE__ ":%s(): " format "\n", __FUNCTION__ , ## arg); \
+ }
+#else
+#define DEBUG(n, arg...)
+static const int debug = 0;
+#endif
+
+#define DRIVER_VERSION "v0.01"
+#define DRIVER_DESC "Logitech Quickcam Messenger USB"
+
+#define USB_LOGITECH_VENDOR_ID 0x046D
+#define USB_QCM_PRODUCT_ID 0x08F0
+
+#define MAX_CAMERAS 1
+
+#define MAX_COLOUR 32768
+#define MAX_HUE 32768
+#define MAX_BRIGHTNESS 32768
+#define MAX_CONTRAST 32768
+#define MAX_WHITENESS 32768
+
+static int size = SIZE_320X240;
+static int colour = MAX_COLOUR;
+static int hue = MAX_HUE;
+static int brightness = MAX_BRIGHTNESS;
+static int contrast = MAX_CONTRAST;
+static int whiteness = MAX_WHITENESS;
+
+static struct usbvideo *cams;
+
+static struct usb_device_id qcm_table [] = {
+ { USB_DEVICE(USB_LOGITECH_VENDOR_ID, USB_QCM_PRODUCT_ID) },
+ { }
+};
+MODULE_DEVICE_TABLE(usb, qcm_table);
+
+#ifdef CONFIG_INPUT
+static void qcm_register_input(struct qcm *cam, struct usb_device *dev)
+{
+ struct input_dev *input_dev;
+
+ usb_make_path(dev, cam->input_physname, sizeof(cam->input_physname));
+ strncat(cam->input_physname, "/input0", sizeof(cam->input_physname));
+
+ cam->input = input_dev = input_allocate_device();
+ if (!input_dev) {
+ warn("insufficient mem for cam input device");
+ return;
+ }
+
+ input_dev->name = "QCM button";
+ input_dev->phys = cam->input_physname;
+ usb_to_input_id(dev, &input_dev->id);
+ input_dev->cdev.dev = &dev->dev;
+
+ input_dev->evbit[0] = BIT(EV_KEY);
+ input_dev->keybit[LONG(BTN_0)] = BIT(BTN_0);
+
+ input_dev->private = cam;
+
+ input_register_device(cam->input);
+}
+
+static void qcm_unregister_input(struct qcm *cam)
+{
+ if (cam->input) {
+ input_unregister_device(cam->input);
+ cam->input = NULL;
+ }
+}
+
+static void qcm_report_buttonstat(struct qcm *cam)
+{
+ if (cam->input) {
+ input_report_key(cam->input, BTN_0, cam->button_sts);
+ input_sync(cam->input);
+ }
+}
+
+static void qcm_int_irq(struct urb *urb, struct pt_regs *regs)
+{
+ int ret;
+ struct uvd *uvd = urb->context;
+ struct qcm *cam;
+
+ if (!CAMERA_IS_OPERATIONAL(uvd))
+ return;
+
+ if (!uvd->streaming)
+ return;
+
+ uvd->stats.urb_count++;
+
+ if (urb->status < 0)
+ uvd->stats.iso_err_count++;
+ else {
+ if (urb->actual_length > 0 ) {
+ cam = (struct qcm *) uvd->user_data;
+ if (cam->button_sts_buf == 0x88)
+ cam->button_sts = 0x0;
+ else if (cam->button_sts_buf == 0x80)
+ cam->button_sts = 0x1;
+ qcm_report_buttonstat(cam);
+ }
+ }
+
+ urb->status = 0;
+ urb->actual_length = 0;
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret < 0)
+ err("usb_submit_urb error (%d)", ret);
+}
+
+static void qcm_setup_input_int(struct qcm *cam, struct uvd *uvd)
+{
+ int errflag;
+ usb_fill_int_urb(cam->button_urb, uvd->dev,
+ usb_rcvintpipe(uvd->dev, uvd->video_endp + 1),
+ &cam->button_sts_buf,
+ 1,
+ qcm_int_irq,
+ uvd, 16);
+
+ errflag = usb_submit_urb(cam->button_urb, GFP_KERNEL);
+ if (errflag)
+ err ("usb_submit_int ret %d", errflag);
+}
+
+static void qcm_stop_int_data(struct qcm *cam)
+{
+ usb_kill_urb(cam->button_urb);
+}
+
+static int qcm_alloc_int_urb(struct qcm *cam)
+{
+ cam->button_urb = usb_alloc_urb(0, GFP_KERNEL);
+
+ if (!cam->button_urb)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void qcm_free_int(struct qcm *cam)
+{
+ if (cam->button_urb)
+ usb_free_urb(cam->button_urb);
+}
+#endif /* CONFIG_INPUT */
+
+static int qcm_stv_setb(struct usb_device *dev, u16 reg, u8 val)
+{
+ int ret;
+
+ /* we'll wait up to 3 slices but no more */
+ ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ 0x04, USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+ reg, 0, &val, 1, 3*HZ);
+ return ret;
+}
+
+static int qcm_stv_setw(struct usb_device *dev, u16 reg, u16 val)
+{
+ int ret;
+
+ /* we'll wait up to 3 slices but no more */
+ ret = usb_control_msg(dev, usb_sndctrlpipe(dev, 0),
+ 0x04, USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_DEVICE,
+ reg, 0, &val, 2, 3*HZ);
+ return ret;
+}
+
+static int qcm_stv_getw(struct usb_device *dev, unsigned short reg,
+ __le16 *val)
+{
+ int ret;
+
+ /* we'll wait up to 3 slices but no more */
+ ret = usb_control_msg(dev, usb_rcvctrlpipe(dev, 0),
+ 0x04, USB_TYPE_VENDOR | USB_DIR_IN | USB_RECIP_DEVICE,
+ reg, 0, val, 2, 3*HZ);
+ return ret;
+}
+
+static int qcm_camera_on(struct uvd *uvd)
+{
+ int ret;
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, STV_ISO_ENABLE, 0x01));
+ return 0;
+}
+
+static int qcm_camera_off(struct uvd *uvd)
+{
+ int ret;
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, STV_ISO_ENABLE, 0x00));
+ return 0;
+}
+
+static void qcm_hsv2rgb(u16 hue, u16 sat, u16 val, u16 *r, u16 *g, u16 *b)
+{
+ unsigned int segment, valsat;
+ signed int h = (signed int) hue;
+ unsigned int s = (sat - 32768) * 2; /* rescale */
+ unsigned int v = val;
+ unsigned int p;
+
+ /*
+ the registers controling gain are 8 bit of which
+ we affect only the last 4 bits with our gain.
+ we know that if saturation is 0, (unsaturated) then
+ we're grayscale (center axis of the colour cone) so
+ we set rgb=value. we use a formula obtained from
+ wikipedia to map the cone to the RGB plane. it's
+ as follows for the human value case of h=0..360,
+ s=0..1, v=0..1
+ h_i = h/60 % 6 , f = h/60 - h_i , p = v(1-s)
+ q = v(1 - f*s) , t = v(1 - (1-f)s)
+ h_i==0 => r=v , g=t, b=p
+ h_i==1 => r=q , g=v, b=p
+ h_i==2 => r=p , g=v, b=t
+ h_i==3 => r=p , g=q, b=v
+ h_i==4 => r=t , g=p, b=v
+ h_i==5 => r=v , g=p, b=q
+ the bottom side (the point) and the stuff just up
+ of that is black so we simplify those two cases.
+ */
+ if (sat < 32768) {
+ /* anything less than this is unsaturated */
+ *r = val;
+ *g = val;
+ *b = val;
+ return;
+ }
+ if (val <= (0xFFFF/8)) {
+ /* anything less than this is black */
+ *r = 0;
+ *g = 0;
+ *b = 0;
+ return;
+ }
+
+ /* the rest of this code is copying tukkat's
+ implementation of the hsv2rgb conversion as taken
+ from qc-usb-messenger code. the 10923 is 0xFFFF/6
+ to divide the cone into 6 sectors. */
+
+ segment = (h + 10923) & 0xFFFF;
+ segment = segment*3 >> 16; /* 0..2: 0=R, 1=G, 2=B */
+ hue -= segment * 21845; /* -10923..10923 */
+ h = hue;
+ h *= 3;
+ valsat = v*s >> 16; /* 0..65534 */
+ p = v - valsat;
+ if (h >= 0) {
+ unsigned int t = v - (valsat * (32769 - h) >> 15);
+ switch (segment) {
+ case 0: /* R-> */
+ *r = v;
+ *g = t;
+ *b = p;
+ break;
+ case 1: /* G-> */
+ *r = p;
+ *g = v;
+ *b = t;
+ break;
+ case 2: /* B-> */
+ *r = t;
+ *g = p;
+ *b = v;
+ break;
+ }
+ } else {
+ unsigned int q = v - (valsat * (32769 + h) >> 15);
+ switch (segment) {
+ case 0: /* ->R */
+ *r = v;
+ *g = p;
+ *b = q;
+ break;
+ case 1: /* ->G */
+ *r = q;
+ *g = v;
+ *b = p;
+ break;
+ case 2: /* ->B */
+ *r = p;
+ *g = q;
+ *b = v;
+ break;
+ }
+ }
+}
+
+static int qcm_sensor_set_gains(struct uvd *uvd, u16 hue,
+ u16 saturation, u16 value)
+{
+ int ret;
+ u16 r,g,b;
+
+ /* this code is based on qc-usb-messenger */
+ qcm_hsv2rgb(hue, saturation, value, &r, &g, &b);
+
+ r >>= 12;
+ g >>= 12;
+ b >>= 12;
+
+ /* min val is 8 */
+ r = max((u16) 8, r);
+ g = max((u16) 8, g);
+ b = max((u16) 8, b);
+
+ r |= 0x30;
+ g |= 0x30;
+ b |= 0x30;
+
+ /* set the r,g,b gain registers */
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x0509, r));
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x050A, g));
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x050B, b));
+
+ /* doing as qc-usb did */
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x050C, 0x2A));
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x050D, 0x01));
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143F, 0x01));
+
+ return 0;
+}
+
+static int qcm_sensor_set_exposure(struct uvd *uvd, int exposure)
+{
+ int ret;
+ int formedval;
+
+ /* calculation was from qc-usb-messenger driver */
+ formedval = ( exposure >> 12 );
+
+ /* max value for formedval is 14 */
+ formedval = min(formedval, 14);
+
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev,
+ 0x143A, 0xF0 | formedval));
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143F, 0x01));
+ return 0;
+}
+
+static int qcm_sensor_setlevels(struct uvd *uvd, int brightness, int contrast,
+ int hue, int colour)
+{
+ int ret;
+ /* brightness is exposure, contrast is gain, colour is saturation */
+ CHECK_RET(ret,
+ qcm_sensor_set_exposure(uvd, brightness));
+ CHECK_RET(ret, qcm_sensor_set_gains(uvd, hue, colour, contrast));
+
+ return 0;
+}
+
+static int qcm_sensor_setsize(struct uvd *uvd, u8 size)
+{
+ int ret;
+
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x1505, size));
+ return 0;
+}
+
+static int qcm_sensor_set_shutter(struct uvd *uvd, int whiteness)
+{
+ int ret;
+ /* some rescaling as done by the qc-usb-messenger code */
+ if (whiteness > 0xC000)
+ whiteness = 0xC000 + (whiteness & 0x3FFF)*8;
+
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143D,
+ (whiteness >> 8) & 0xFF));
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143E,
+ (whiteness >> 16) & 0x03));
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x143F, 0x01));
+
+ return 0;
+}
+
+static int qcm_sensor_init(struct uvd *uvd)
+{
+ struct qcm *cam = (struct qcm *) uvd->user_data;
+ int ret;
+ int i;
+
+ for (i=0; i < sizeof(regval_table)/sizeof(regval_table[0]) ; i++) {
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev,
+ regval_table[i].reg,
+ regval_table[i].val));
+ }
+
+ CHECK_RET(ret, qcm_stv_setw(uvd->dev, 0x15c1,
+ cpu_to_le16(ISOC_PACKET_SIZE)));
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, 0x15c3, 0x08));
+ CHECK_RET(ret, ret = qcm_stv_setb(uvd->dev, 0x143f, 0x01));
+
+ CHECK_RET(ret, qcm_stv_setb(uvd->dev, STV_ISO_ENABLE, 0x00));
+
+ CHECK_RET(ret, qcm_sensor_setsize(uvd, camera_sizes[cam->size].cmd));
+
+ CHECK_RET(ret, qcm_sensor_setlevels(uvd, uvd->vpic.brightness,
+ uvd->vpic.contrast, uvd->vpic.hue, uvd->vpic.colour));
+
+ CHECK_RET(ret, qcm_sensor_set_shutter(uvd, uvd->vpic.whiteness));
+ CHECK_RET(ret, qcm_sensor_setsize(uvd, camera_sizes[cam->size].cmd));
+
+ return 0;
+}
+
+static int qcm_set_camera_size(struct uvd *uvd)
+{
+ int ret;
+ struct qcm *cam = (struct qcm *) uvd->user_data;
+
+ cam->width = camera_sizes[cam->size].width;
+ cam->height = camera_sizes[cam->size].height;
+ uvd->videosize = VIDEOSIZE(cam->width, cam->height);
+ CHECK_RET(ret, qcm_sensor_setsize(uvd, camera_sizes[cam->size].cmd));
+
+ return 0;
+}
+
+static int qcm_setup_on_open(struct uvd *uvd)
+{
+ int ret;
+
+ CHECK_RET(ret, qcm_sensor_set_gains(uvd, uvd->vpic.hue,
+ uvd->vpic.colour, uvd->vpic.contrast));
+ CHECK_RET(ret, qcm_sensor_set_exposure(uvd, uvd->vpic.brightness));
+ CHECK_RET(ret, qcm_sensor_set_shutter(uvd, uvd->vpic.whiteness));
+ CHECK_RET(ret, qcm_set_camera_size(uvd));
+ CHECK_RET(ret, qcm_camera_on(uvd));
+ return 0;
+}
+
+static void qcm_adjust_picture(struct uvd *uvd)
+{
+ int ret;
+ struct qcm *cam = (struct qcm *) uvd->user_data;
+
+ ret = qcm_camera_off(uvd);
+ if (ret) {
+ err("can't turn camera off. abandoning pic adjustment");
+ return;
+ }
+
+ /* if there's been a change in contrast, hue, or
+ colour then we need to recalculate hsv in order
+ to update gains */
+ if ((cam->contrast != uvd->vpic.contrast) ||
+ (cam->hue != uvd->vpic.hue) ||
+ (cam->colour != uvd->vpic.colour)) {
+ cam->contrast = uvd->vpic.contrast;
+ cam->hue = uvd->vpic.hue;
+ cam->colour = uvd->vpic.colour;
+ ret = qcm_sensor_set_gains(uvd, cam->hue, cam->colour,
+ cam->contrast);
+ if (ret) {
+ err("can't set gains. abandoning pic adjustment");
+ return;
+ }
+ }
+
+ if (cam->brightness != uvd->vpic.brightness) {
+ cam->brightness = uvd->vpic.brightness;
+ ret = qcm_sensor_set_exposure(uvd, cam->brightness);
+ if (ret) {
+ err("can't set exposure. abandoning pic adjustment");
+ return;
+ }
+ }
+
+ if (cam->whiteness != uvd->vpic.whiteness) {
+ cam->whiteness = uvd->vpic.whiteness;
+ qcm_sensor_set_shutter(uvd, cam->whiteness);
+ if (ret) {
+ err("can't set shutter. abandoning pic adjustment");
+ return;
+ }
+ }
+
+ ret = qcm_camera_on(uvd);
+ if (ret) {
+ err("can't reenable camera. pic adjustment failed");
+ return;
+ }
+}
+
+static int qcm_process_frame(struct uvd *uvd, u8 *cdata, int framelen)
+{
+ int datalen;
+ int totaldata;
+ struct framehdr {
+ __be16 id;
+ __be16 len;
+ };
+ struct framehdr *fhdr;
+
+ totaldata = 0;
+ while (framelen) {
+ fhdr = (struct framehdr *) cdata;
+ datalen = be16_to_cpu(fhdr->len);
+ framelen -= 4;
+ cdata += 4;
+
+ if ((fhdr->id) == cpu_to_be16(0x8001)) {
+ RingQueue_Enqueue(&uvd->dp, marker, 4);
+ totaldata += 4;
+ continue;
+ }
+ if ((fhdr->id & cpu_to_be16(0xFF00)) == cpu_to_be16(0x0200)) {
+ RingQueue_Enqueue(&uvd->dp, cdata, datalen);
+ totaldata += datalen;
+ }
+ framelen -= datalen;
+ cdata += datalen;
+ }
+ return totaldata;
+}
+
+static int qcm_compress_iso(struct uvd *uvd, struct urb *dataurb)
+{
+ int totlen;
+ int i;
+ unsigned char *cdata;
+
+ totlen=0;
+ for (i = 0; i < dataurb->number_of_packets; i++) {
+ int n = dataurb->iso_frame_desc[i].actual_length;
+ int st = dataurb->iso_frame_desc[i].status;
+
+ cdata = dataurb->transfer_buffer +
+ dataurb->iso_frame_desc[i].offset;
+
+ if (st < 0) {
+ warn("Data error: packet=%d. len=%d. status=%d.",
+ i, n, st);
+ uvd->stats.iso_err_count++;
+ continue;
+ }
+ if (!n)
+ continue;
+
+ totlen += qcm_process_frame(uvd, cdata, n);
+ }
+ return totlen;
+}
+
+static void resubmit_urb(struct uvd *uvd, struct urb *urb)
+{
+ int i, ret;
+
+ for (i = 0; i < FRAMES_PER_DESC; i++) {
+ urb->iso_frame_desc[i].status = 0;
+ }
+ urb->dev = uvd->dev;
+ urb->status = 0;
+ ret = usb_submit_urb(urb, GFP_ATOMIC);
+ if (ret)
+ err("usb_submit_urb error (%d)", ret);
+}
+
+static void qcm_isoc_irq(struct urb *urb, struct pt_regs *regs)
+{
+ int len;
+ struct uvd *uvd = urb->context;
+
+ if (!CAMERA_IS_OPERATIONAL(uvd))
+ return;
+
+ if (!uvd->streaming)
+ return;
+
+ uvd->stats.urb_count++;
+
+ if (!urb->actual_length) {
+ resubmit_urb(uvd, urb);
+ return;
+ }
+
+ len = qcm_compress_iso(uvd, urb);
+ resubmit_urb(uvd, urb);
+ uvd->stats.urb_length = len;
+ uvd->stats.data_count += len;
+ if (len)
+ RingQueue_WakeUpInterruptible(&uvd->dp);
+}
+
+static int qcm_start_data(struct uvd *uvd)
+{
+ struct qcm *cam = (struct qcm *) uvd->user_data;
+ int i;
+ int errflag;
+ int pktsz;
+ int err;
+
+ pktsz = uvd->iso_packet_len;
+ if (!CAMERA_IS_OPERATIONAL(uvd)) {
+ err("Camera is not operational");
+ return -EFAULT;
+ }
+
+ err = usb_set_interface(uvd->dev, uvd->iface, uvd->ifaceAltActive);
+ if (err < 0) {
+ err("usb_set_interface error");
+ uvd->last_error = err;
+ return -EBUSY;
+ }
+
+ for (i=0; i < USBVIDEO_NUMSBUF; i++) {
+ int j, k;
+ struct urb *urb = uvd->sbuf[i].urb;
+ urb->dev = uvd->dev;
+ urb->context = uvd;
+ urb->pipe = usb_rcvisocpipe(uvd->dev, uvd->video_endp);
+ urb->interval = 1;
+ urb->transfer_flags = URB_ISO_ASAP;
+ urb->transfer_buffer = uvd->sbuf[i].data;
+ urb->complete = qcm_isoc_irq;
+ urb->number_of_packets = FRAMES_PER_DESC;
+ urb->transfer_buffer_length = pktsz * FRAMES_PER_DESC;
+ for (j=k=0; j < FRAMES_PER_DESC; j++, k += pktsz) {
+ urb->iso_frame_desc[j].offset = k;
+ urb->iso_frame_desc[j].length = pktsz;
+ }
+ }
+
+ uvd->streaming = 1;
+ uvd->curframe = -1;
+ for (i=0; i < USBVIDEO_NUMSBUF; i++) {
+ errflag = usb_submit_urb(uvd->sbuf[i].urb, GFP_KERNEL);
+ if (errflag)
+ err ("usb_submit_isoc(%d) ret %d", i, errflag);
+ }
+
+ qcm_setup_input_int(cam, uvd);
+ CHECK_RET(err,qcm_camera_on(uvd));
+ return 0;
+}
+
+static void qcm_stop_data(struct uvd *uvd)
+{
+ struct qcm *cam = (struct qcm *) uvd->user_data;
+ int i, j;
+ int ret;
+
+ if ((uvd == NULL) || (!uvd->streaming) || (uvd->dev == NULL))
+ return;
+
+ ret = qcm_camera_off(uvd);
+ if (ret)
+ warn("couldn't turn the cam off.");
+
+ uvd->streaming = 0;
+
+ /* Unschedule all of the iso td's */
+ for (i=0; i < USBVIDEO_NUMSBUF; i++)
+ usb_kill_urb(uvd->sbuf[i].urb);
+
+ qcm_stop_int_data(cam);
+
+ if (!uvd->remove_pending) {
+ /* Set packet size to 0 */
+ j = usb_set_interface(uvd->dev, uvd->iface,
+ uvd->ifaceAltInactive);
+ if (j < 0) {
+ err("usb_set_interface() error %d.", j);
+ uvd->last_error = j;
+ }
+ }
+}
+
+static void qcm_process_isoc(struct uvd *uvd, struct usbvideo_frame *frame)
+{
+ struct qcm *cam = (struct qcm *) uvd->user_data;
+ int x;
+ struct rgb *rgbL0;
+ struct rgb *rgbL1;
+ struct bayL0 *bayL0;
+ struct bayL1 *bayL1;
+ int hor,ver,hordel,verdel;
+ assert(frame != NULL);
+
+ switch (cam->size) {
+ case SIZE_160X120:
+ hor = 162; ver = 124; hordel = 1; verdel = 2;
+ break;
+ case SIZE_320X240:
+ default:
+ hor = 324; ver = 248; hordel = 2; verdel = 4;
+ break;
+ }
+
+ if (frame->scanstate == ScanState_Scanning) {
+ while (RingQueue_GetLength(&uvd->dp) >=
+ 4 + (hor*verdel + hordel)) {
+ if ((RING_QUEUE_PEEK(&uvd->dp, 0) == 0x00) &&
+ (RING_QUEUE_PEEK(&uvd->dp, 1) == 0xff) &&
+ (RING_QUEUE_PEEK(&uvd->dp, 2) == 0x00) &&
+ (RING_QUEUE_PEEK(&uvd->dp, 3) == 0xff)) {
+ frame->curline = 0;
+ frame->scanstate = ScanState_Lines;
+ frame->frameState = FrameState_Grabbing;
+ RING_QUEUE_DEQUEUE_BYTES(&uvd->dp, 4);
+ /*
+ * if we're starting, we need to discard the first
+ * 4 lines of y bayer data
+ * and the first 2 gr elements of x bayer data
+ */
+ RING_QUEUE_DEQUEUE_BYTES(&uvd->dp,
+ (hor*verdel + hordel));
+ break;
+ }
+ RING_QUEUE_DEQUEUE_BYTES(&uvd->dp, 1);
+ }
+ }
+
+ if (frame->scanstate == ScanState_Scanning)
+ return;
+
+ /* now we can start processing bayer data so long as we have at least
+ * 2 lines worth of data. this is the simplest demosaicing method that
+ * I could think of. I use each 2x2 bayer element without interpolation
+ * to generate 4 rgb pixels.
+ */
+ while ( frame->curline < cam->height &&
+ (RingQueue_GetLength(&uvd->dp) >= hor*2)) {
+ /* get 2 lines of bayer for demosaicing
+ * into 2 lines of RGB */
+ RingQueue_Dequeue(&uvd->dp, cam->scratch, hor*2);
+ bayL0 = (struct bayL0 *) cam->scratch;
+ bayL1 = (struct bayL1 *) (cam->scratch + hor);
+ /* frame->curline is the rgb y line */
+ rgbL0 = (struct rgb *)
+ ( frame->data + (cam->width*3*frame->curline));
+ /* w/2 because we're already doing 2 pixels */
+ rgbL1 = rgbL0 + (cam->width/2);
+
+ for (x=0; x < cam->width; x+=2) {
+ rgbL0->r = bayL0->r;
+ rgbL0->g = bayL0->g;
+ rgbL0->b = bayL1->b;
+
+ rgbL0->r2 = bayL0->r;
+ rgbL0->g2 = bayL1->g;
+ rgbL0->b2 = bayL1->b;
+
+ rgbL1->r = bayL0->r;
+ rgbL1->g = bayL1->g;
+ rgbL1->b = bayL1->b;
+
+ rgbL1->r2 = bayL0->r;
+ rgbL1->g2 = bayL1->g;
+ rgbL1->b2 = bayL1->b;
+
+ rgbL0++;
+ rgbL1++;
+
+ bayL0++;
+ bayL1++;
+ }
+
+ frame->seqRead_Length += cam->width*3*2;
+ frame->curline += 2;
+ }
+ /* See if we filled the frame */
+ if (frame->curline == cam->height) {
+ frame->frameState = FrameState_Done_Hold;
+ frame->curline = 0;
+ uvd->curframe = -1;
+ uvd->stats.frame_num++;
+ }
+}
+
+/* taken from konicawc */
+static int qcm_set_video_mode(struct uvd *uvd, struct video_window *vw)
+{
+ int ret;
+ int newsize;
+ int x = vw->width;
+ int y = vw->height;
+ struct qcm *cam = (struct qcm *) uvd->user_data;
+
+ if (x > 0 && y > 0) {
+ DEBUG(2, "trying to find size %d,%d", x, y);
+ for (newsize = 0; newsize <= MAX_FRAME_SIZE; newsize++) {
+ if ((camera_sizes[newsize].width == x) &&
+ (camera_sizes[newsize].height == y))
+ break;
+ }
+ } else
+ newsize = cam->size;
+
+ if (newsize > MAX_FRAME_SIZE) {
+ DEBUG(1, "couldn't find size %d,%d", x, y);
+ return -EINVAL;
+ }
+
+ if (newsize == cam->size) {
+ DEBUG(1, "Nothing to do");
+ return 0;
+ }
+
+ qcm_stop_data(uvd);
+
+ if (cam->size != newsize) {
+ cam->size = newsize;
+ ret = qcm_set_camera_size(uvd);
+ if (ret) {
+ err("Couldn't set camera size, err=%d",ret);
+ return ret;
+ }
+ }
+
+ /* Flush the input queue and clear any current frame in progress */
+
+ RingQueue_Flush(&uvd->dp);
+ if (uvd->curframe != -1) {
+ uvd->frame[uvd->curframe].curline = 0;
+ uvd->frame[uvd->curframe].seqRead_Length = 0;
+ uvd->frame[uvd->curframe].seqRead_Index = 0;
+ }
+
+ CHECK_RET(ret, qcm_start_data(uvd));
+ return 0;
+}
+
+static int qcm_configure_video(struct uvd *uvd)
+{
+ int ret;
+ memset(&uvd->vpic, 0, sizeof(uvd->vpic));
+ memset(&uvd->vpic_old, 0x55, sizeof(uvd->vpic_old));
+
+ uvd->vpic.colour = colour;
+ uvd->vpic.hue = hue;
+ uvd->vpic.brightness = brightness;
+ uvd->vpic.contrast = contrast;
+ uvd->vpic.whiteness = whiteness;
+ uvd->vpic.depth = 24;
+ uvd->vpic.palette = VIDEO_PALETTE_RGB24;
+
+ memset(&uvd->vcap, 0, sizeof(uvd->vcap));
+ strcpy(uvd->vcap.name, "QCM USB Camera");
+ uvd->vcap.type = VID_TYPE_CAPTURE;
+ uvd->vcap.channels = 1;
+ uvd->vcap.audios = 0;
+
+ uvd->vcap.minwidth = camera_sizes[SIZE_160X120].width;
+ uvd->vcap.minheight = camera_sizes[SIZE_160X120].height;
+ uvd->vcap.maxwidth = camera_sizes[SIZE_320X240].width;
+ uvd->vcap.maxheight = camera_sizes[SIZE_320X240].height;
+
+ memset(&uvd->vchan, 0, sizeof(uvd->vchan));
+ uvd->vchan.flags = 0 ;
+ uvd->vchan.tuners = 0;
+ uvd->vchan.channel = 0;
+ uvd->vchan.type = VIDEO_TYPE_CAMERA;
+ strcpy(uvd->vchan.name, "Camera");
+
+ CHECK_RET(ret, qcm_sensor_init(uvd));
+ return 0;
+}
+
+static int qcm_probe(struct usb_interface *intf,
+ const struct usb_device_id *devid)
+{
+ int err;
+ struct uvd *uvd;
+ struct usb_device *dev = interface_to_usbdev(intf);
+ struct qcm *cam;
+ size_t buffer_size;
+ unsigned char video_ep;
+ struct usb_host_interface *interface;
+ struct usb_endpoint_descriptor *endpoint;
+ int i,j;
+ unsigned int ifacenum, ifacenum_inact=0;
+ __le16 sensor_id;
+
+ /* we don't support multiconfig cams */
+ if (dev->descriptor.bNumConfigurations != 1)
+ return -ENODEV;
+
+ /* first check for the video interface and not
+ * the audio interface */
+ interface = &intf->cur_altsetting[0];
+ if ((interface->desc.bInterfaceClass != USB_CLASS_VENDOR_SPEC)
+ || (interface->desc.bInterfaceSubClass !=
+ USB_CLASS_VENDOR_SPEC))
+ return -ENODEV;
+
+ /*
+ walk through each endpoint in each setting in the interface
+ stop when we find the one that's an isochronous IN endpoint.
+ */
+ for (i=0; i < intf->num_altsetting; i++) {
+ interface = &intf->cur_altsetting[i];
+ ifacenum = interface->desc.bAlternateSetting;
+ /* walk the end points */
+ for (j=0; j < interface->desc.bNumEndpoints; j++) {
+ endpoint = &interface->endpoint[j].desc;
+
+ if ((endpoint->bEndpointAddress &
+ USB_ENDPOINT_DIR_MASK) != USB_DIR_IN)
+ continue; /* not input then not good */
+
+ buffer_size = le16_to_cpu(endpoint->wMaxPacketSize);
+ if (!buffer_size) {
+ ifacenum_inact = ifacenum;
+ continue; /* 0 pkt size is not what we want */
+ }
+
+ if ((endpoint->bmAttributes &
+ USB_ENDPOINT_XFERTYPE_MASK) ==
+ USB_ENDPOINT_XFER_ISOC) {
+ video_ep = endpoint->bEndpointAddress;
+ /* break out of the search */
+ goto good_videoep;
+ }
+ }
+ }
+ /* failed out since nothing useful was found */
+ err("No suitable endpoint was found\n");
+ return -ENODEV;
+
+good_videoep:
+ /* disable isochronous stream before doing anything else */
+ err = qcm_stv_setb(dev, STV_ISO_ENABLE, 0);
+ if (err < 0) {
+ err("Failed to disable sensor stream");
+ return -EIO;
+ }
+
+ /*
+ Check that this is the same unknown sensor that is known to work. This
+ sensor is suspected to be the ST VV6422C001. I'll check the same value
+ that the qc-usb driver checks. This value is probably not even the
+ sensor ID since it matches the USB dev ID. Oh well. If it doesn't
+ match, it's probably a diff sensor so exit and apologize.
+ */
+ err = qcm_stv_getw(dev, CMOS_SENSOR_IDREV, &sensor_id);
+ if (err < 0) {
+ err("Couldn't read sensor values. Err %d\n",err);
+ return err;
+ }
+ if (sensor_id != cpu_to_le16(0x08F0)) {
+ err("Sensor ID %x != %x. Unsupported. Sorry\n",
+ le16_to_cpu(sensor_id), (0x08F0));
+ return -ENODEV;
+ }
+
+ uvd = usbvideo_AllocateDevice(cams);
+ if (!uvd)
+ return -ENOMEM;
+
+ cam = (struct qcm *) uvd->user_data;
+
+ /* buf for doing demosaicing */
+ cam->scratch = kmalloc(324*2, GFP_KERNEL);
+ if (!cam->scratch) /* uvd freed in dereg */
+ return -ENOMEM;
+
+ /* yes, if we fail after here, cam->scratch gets freed
+ by qcm_free_uvd */
+
+ err = qcm_alloc_int_urb(cam);
+ if (err < 0)
+ return err;
+
+ /* yes, if we fail after here, int urb gets freed
+ by qcm_free_uvd */
+
+ RESTRICT_TO_RANGE(size, SIZE_160X120, SIZE_320X240);
+ cam->width = camera_sizes[size].width;
+ cam->height = camera_sizes[size].height;
+ cam->size = size;
+
+ uvd->debug = debug;
+ uvd->flags = 0;
+ uvd->dev = dev;
+ uvd->iface = intf->altsetting->desc.bInterfaceNumber;
+ uvd->ifaceAltActive = ifacenum;
+ uvd->ifaceAltInactive = ifacenum_inact;
+ uvd->video_endp = video_ep;
+ uvd->iso_packet_len = buffer_size;
+ uvd->paletteBits = 1L << VIDEO_PALETTE_RGB24;
+ uvd->defaultPalette = VIDEO_PALETTE_RGB24;
+ uvd->canvas = VIDEOSIZE(320, 240);
+ uvd->videosize = VIDEOSIZE(cam->width, cam->height);
+ err = qcm_configure_video(uvd);
+ if (err) {
+ err("failed to configure video settings");
+ return err;
+ }
+
+ err = usbvideo_RegisterVideoDevice(uvd);
+ if (err) { /* the uvd gets freed in Deregister */
+ err("usbvideo_RegisterVideoDevice() failed.");
+ return err;
+ }
+
+ uvd->max_frame_size = (320 * 240 * 3);
+ qcm_register_input(cam, dev);
+ usb_set_intfdata(intf, uvd);
+ return 0;
+}
+
+static void qcm_free_uvd(struct uvd *uvd)
+{
+ struct qcm *cam = (struct qcm *) uvd->user_data;
+
+ kfree(cam->scratch);
+ qcm_unregister_input(cam);
+ qcm_free_int(cam);
+}
+
+static struct usbvideo_cb qcm_driver = {
+ .probe = qcm_probe,
+ .setupOnOpen = qcm_setup_on_open,
+ .processData = qcm_process_isoc,
+ .setVideoMode = qcm_set_video_mode,
+ .startDataPump = qcm_start_data,
+ .stopDataPump = qcm_stop_data,
+ .adjustPicture = qcm_adjust_picture,
+ .userFree = qcm_free_uvd
+};
+
+static int __init qcm_init(void)
+{
+ info(DRIVER_DESC " " DRIVER_VERSION);
+
+ return usbvideo_register(
+ &cams,
+ MAX_CAMERAS,
+ sizeof(struct qcm),
+ "QCM",
+ &qcm_driver,
+ THIS_MODULE,
+ qcm_table);
+}
+
+static void __exit qcm_exit(void)
+{
+ usbvideo_Deregister(&cams);
+}
+
+module_param(size, int, 0);
+MODULE_PARM_DESC(size, "Initial Size 0: 160x120 1: 320x240");
+module_param(colour, int, 0);
+MODULE_PARM_DESC(colour, "Initial colour");
+module_param(hue, int, 0);
+MODULE_PARM_DESC(hue, "Initial hue");
+module_param(brightness, int, 0);
+MODULE_PARM_DESC(brightness, "Initial brightness");
+module_param(contrast, int, 0);
+MODULE_PARM_DESC(contrast, "Initial contrast");
+module_param(whiteness, int, 0);
+MODULE_PARM_DESC(whiteness, "Initial whiteness");
+
+#ifdef CONFIG_USB_DEBUG
+module_param(debug, int, S_IRUGO | S_IWUSR);
+MODULE_PARM_DESC(debug, "Debug level: 0-9 (default=0)");
+#endif
+
+module_init(qcm_init);
+module_exit(qcm_exit);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jaya Kumar");
+MODULE_DESCRIPTION("QCM USB Camera");
+MODULE_SUPPORTED_DEVICE("QCM USB Camera");
diff -X linux-2.6.16.5/Documentation/dontdiff -uprN linux-2.6.16.5-vanilla/drivers/usb/media/quickcam_messenger.h linux-2.6.16.5/drivers/usb/media/quickcam_messenger.h
--- linux-2.6.16.5-vanilla/drivers/usb/media/quickcam_messenger.h 1970-01-01 07:30:00.000000000 +0730
+++ linux-2.6.16.5/drivers/usb/media/quickcam_messenger.h 2006-05-15 15:46:52.000000000 +0800
@@ -0,0 +1,126 @@
+#ifndef quickcam_messenger_h
+#define quickcam_messenger_h
+
+#ifndef CONFIG_INPUT
+/* if we're not using input we dummy out these functions */
+#define qcm_register_input(...)
+#define qcm_unregister_input(...)
+#define qcm_report_buttonstat(...)
+#define qcm_setup_input_int(...)
+#define qcm_stop_int_data(...)
+#define qcm_alloc_int_urb(...) 0
+#define qcm_free_int(...)
+#endif
+
+
+#define CHECK_RET(ret, expr) \
+ if ((ret = expr) < 0) return ret
+
+/* Control Registers for the STVV6422 ASIC
+ * - this define is taken from the qc-usb-messenger code
+ */
+#define STV_ISO_ENABLE 0x1440
+#define ISOC_PACKET_SIZE 1023
+
+/* Chip identification number including revision indicator */
+#define CMOS_SENSOR_IDREV 0xE00A
+
+struct rgb {
+ u8 b;
+ u8 g;
+ u8 r;
+ u8 b2;
+ u8 g2;
+ u8 r2;
+};
+
+struct bayL0 {
+#ifdef __BIG_ENDIAN
+ u8 r;
+ u8 g;
+#elif __LITTLE_ENDIAN
+ u8 g;
+ u8 r;
+#else
+#error not byte order defined
+#endif
+};
+
+struct bayL1 {
+#ifdef __BIG_ENDIAN
+ u8 g;
+ u8 b;
+#elif __LITTLE_ENDIAN
+ u8 b;
+ u8 g;
+#else
+#error not byte order defined
+#endif
+};
+
+struct cam_size {
+ u16 width;
+ u16 height;
+ u8 cmd;
+};
+
+static const struct cam_size camera_sizes[] = {
+ { 160, 120, 0xf },
+ { 320, 240, 0x2 },
+};
+
+enum frame_sizes {
+ SIZE_160X120 = 0,
+ SIZE_320X240 = 1,
+};
+
+#define MAX_FRAME_SIZE SIZE_320X240
+
+struct qcm {
+ u16 colour;
+ u16 hue;
+ u16 brightness;
+ u16 contrast;
+ u16 whiteness;
+
+ u8 size;
+ int height;
+ int width;
+ u8 *scratch;
+ struct urb *button_urb;
+ u8 button_sts;
+ u8 button_sts_buf;
+
+#ifdef CONFIG_INPUT
+ struct input_dev *input;
+ char input_physname[64];
+#endif
+};
+
+struct regval {
+ u16 reg;
+ u8 val;
+};
+/* this table is derived from the
+qc-usb-messenger code */
+static const struct regval regval_table[] = {
+ { STV_ISO_ENABLE, 0x00 },
+ { 0x1436, 0x00 }, { 0x1432, 0x03 },
+ { 0x143a, 0xF9 }, { 0x0509, 0x38 },
+ { 0x050a, 0x38 }, { 0x050b, 0x38 },
+ { 0x050c, 0x2A }, { 0x050d, 0x01 },
+ { 0x1431, 0x00 }, { 0x1433, 0x34 },
+ { 0x1438, 0x18 }, { 0x1439, 0x00 },
+ { 0x143b, 0x05 }, { 0x143c, 0x00 },
+ { 0x143e, 0x01 }, { 0x143d, 0x00 },
+ { 0x1442, 0xe2 }, { 0x1500, 0xd0 },
+ { 0x1500, 0xd0 }, { 0x1500, 0x50 },
+ { 0x1501, 0xaf }, { 0x1502, 0xc2 },
+ { 0x1503, 0x45 }, { 0x1505, 0x02 },
+ { 0x150e, 0x8e }, { 0x150f, 0x37 },
+ { 0x15c0, 0x00 },
+};
+
+static const unsigned char marker[] = { 0x00, 0xff, 0x00, 0xFF };
+
+#endif /* quickcam_messenger_h */
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
\
 
 \ /
  Last update: 2006-05-15 11:03    [W:0.074 / U:0.848 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site